| dc.description.abstract | The reuse of ornamental rock waste can provide benefits to cementitious
matrices, providing a better destination for it. The following paper studies the partial
replacement of cement by residual ornamental rocks (mud). The replacement took
place in coating mortars, made with CP-V ARI cement, in the 1:1:6 line (cement, lime,
sand). The water content was defined according to the consistency (fixed at 260 ± 5
mm). The potential for improving the properties of the mortar was evaluated from the
determination of its granulometric distribution, the specific surface and the possibility
of the waste to generate nucleation. The differences in the properties of the coating
mortar were evaluated in the fresh and hardened state, and in the coating form. In the
fresh state, the following properties were determined: consistency (spreading table),
water retention and mass density. In the hardened state, the following properties were
determined: compressive and tensile strength, mass density, volumetric variation,
modulus of elasticity, water absorption by immersion, void index and water absorption
by capillarity. In the coating, the tensile bond strength of the mortar applied in a ceramic
block was evaluated. It is observed that the replacement of cement by waste of
ornamental rocks influenced the mortars through the filer effect, acting on the physical
effect, improving the granulometric packaging of the replaced mortars. The results
indicate that the best content of substitution was 15% of cement for ornamental rock
waste. The substitution did not compromise the performance of the produced mortar
properties. Thereby, mortars with different contents of substitution obtained similar
results to the reference mortar with lower levels of cement. The results obtained
indicate that the ornamental rock waste has good potential to be used as filer in
cementitious matrices. | en |
